Common Name(s): 5-ureidohydantoin,glyoxyldiureide,aluminum dihydroxy allantoinate
CAS Number: 97-59-6
DESCRIPTION
What It Does: Soothes irritation, accelerates wound healing, promotes skin cell renewal, and provides mild keratolytic exfoliation.
Why It's Used: Gold standard multi-function soothing active โ one of the most widely used cosmetic ingredients across all product types for its exceptional tolerability and clinically proven multi-action skin conditioning.
How It Works: Promotes keratinocyte proliferation and fibroblast migration for wound healing. mild keratolytic activity by disrupting corneocyte binding. anti-irritant via direct protein binding and anti-inflammatory cytokine reduction. humectant activity via hydroxyl groups.
Typically Found In: Post-procedure products,sensitive skin formulas,wound care,anti-acne treatments,baby products
TECHNICAL DETAILS
Primary Category: Active ingredient โ soothing / anti-inflammatory
Secondary Functions: Wound healing,keratolytic,anti-irritant
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.1%โ2%
SOURCING & ETHICS
Vegan Status: Yes โ synthetic or comfrey-derived
Halal Status: Yes
Source Notes: Plant-derived extract or synthetic.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 0/5 โ non-comedogenic
Sensitivity Concerns: Exceptionally well-tolerated; suitable for all skin types including baby and compromised skin.
Safe for Sensitive Skin: Yes โ particularly recommended for sensitive skin
SAFETY & COMPATIBILITY
Safety Profile: Excellent safety profile. ewg score: 1.
Works Well With: Ceramides,panthenol,allantoin,hyaluronic acid,centella asiatica
Avoid Combining With: No significant incompatibilities
SCIENTIFIC NOTE
Allantoin's keratinocyte proliferation stimulation occurs via receptor-mediated signaling (possibly machr activation) rather than non-specific irritation-driven proliferation, making it a true wound-healing stimulant rather than a pro-inflammatory proliferative signal.
Last Verified: Cosing database,cir safety assessment,araรบjo et al. allantoin review
Primary Sources: 2026-03-12